0.4(x+9)=0.5(10.8-x)

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0.4(x+9)=0.5(10.8-x)0.4(x+9)=0.5(10.8-x)0.4(x+9)=0.5(10.8-x)0.4x+3.6=5.4-0.5x0.9x=1.8x=20.4x+3.6=5.4

0.4(x+9)=0.5(10.8-x)
0.4(x+9)=0.5(10.8-x)

0.4(x+9)=0.5(10.8-x)
0.4x+3.6=5.4-0.5x
0.9x=1.8
x=2

0.4x+3.6=5.4-0.5x x=2